<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <p>jquery test 1 
        <span>dfsf</span>
    </p>
    <p>jquery test 2</p>
    <p>jquery test 3</p>
    <div id="div1">div1</div>

   <!--  <script src="./jquery-3.3.1.js"></script> -->
   <script src='./my-jquery.js'></script>
    <script>
        var $p=$('p');
        $p.css('color','red');
        console.log($p.html());
        
        var $div1=$('#div1')
        $div1.css("color","blue");
        console.log($div1.html());
    </script>
</body>
</html>